| ITF M15 Nakhon Si Thammarat | 02/26 02:00 | 54 | 찬타, 다나페트 v Guntinun Sootinun-Opart | 6-2,6-2 | |
| ITF M15 Nakhon Si Thammarat Qual | 02/25 02:00 | 54 | Guntinun Sootinun-Opart v 코헨, 아론 | 1-6,6-1,10-8 | |
| ITF M15 Nakhon Si Thammarat | 07/02 02:00 | 54 | Guntinun Sootinun-Opart v 찬타, 다나페트 | 1-6,4-6 | |
| ITF M25 Nakhon Si Thammarat | 06/12 02:00 | 54 | Ryotaro Taguchi v Guntinun Sootinun-Opart | 6-4,6-3 | |
| ITF M25 Nakhon Si Thammarat | 06/11 02:00 | 54 | Anapat Timangkul v Guntinun Sootinun-Opart | 6-7,3-6 | |
| ITF M15 Nakhon Si Thammarat Qual | 06/04 01:55 | 54 | Guntinun Sootinun-Opart v Sornlaksup, Pawit | 4-6,1-6 | |
| ITF M15 Nakhon Si Thammarat | 05/28 01:50 | 54 | 데 쿠이퍼, 줄리엔 v Guntinun Sootinun-Opart | 6-3,6-4 | |
| ITF M15 Chiang Rai | 06/21 03:20 | 44 | 레디, 리시 v Guntinun Sootinun-Opart | 6-3,6-0 | |
| ITF M15 Chiang Rai | 06/20 05:45 | 44 | Guntinun Sootinun-Opart v Poonthong Komopisut | 6-1,6-0 | |
| ITF M15 Chiang Rai Qual | 06/19 02:00 | 44 | Guntinun Sootinun-Opart v Sood, Chandril | 6-2,6-2 | |
| ITF M15 Chiang Rai | 06/14 01:55 | 44 | Guntinun Sootinun-Opart v 수크숨라른, 탄투브 | 1-6,2-6 | |
| ITF M15 Chiang Rai | 06/13 02:00 | 44 | 왕, 추한 v Guntinun Sootinun-Opart | 3-6,6-3,10-12 | |
| ITF M15 Chiang Rai | 06/12 05:05 | 44 | Pumiphat Sukkho v Guntinun Sootinun-Opart | 3-6,1-6 | |
| ITF M25 Chiang Rai | 06/07 03:55 | 44 | Sornlaksup, Pawit v Guntinun Sootinun-Opart | 6-2,6-3 | |
| ITF M25 Chiang Rai Qual | 06/06 03:25 | 44 | Guntinun Sootinun-Opart v 친, 크리스티안 디디엘 | Retired | |
| ITF M25 Chiang Rai Qual | 06/05 02:00 | 44 | Hanchaikul, Patorn v Guntinun Sootinun-Opart | 4-6,6-2,7-10 | |
| ITF M25 Chiang Rai | 06/01 06:00 | 25 | Guntinun Sootinun-Opart v 삼레이, 카시디트 | 2-6,5-7 | |
| ITF M25 Chiang Rai | 05/31 04:15 | 44 | 메흐로트라, 아르준 v Guntinun Sootinun-Opart | 4-6,6-3,8-10 | |
| ITF M25 Chiang Rai | 05/30 04:25 | 44 | Panathon Sooksod v Guntinun Sootinun-Opart | 2-6,2-6 | |
| ITF M15 Chiang Rai | 04/12 02:00 | 44 | Guntinun Sootinun-Opart v 이치카와, 타이세이 | 5-7,0-6 | |
| ITF M15 Chiang Rai | 04/11 03:50 | 44 | 브로빌, 맥센스 v Guntinun Sootinun-Opart | 2-6,6-3,4-10 | |
| ITF M15 Chiang Rai Qual | 04/10 03:00 | 44 | Teerapat Khantiweerawat v Guntinun Sootinun-Opart | 3-6,1-6 | |
| ITF M15 Chiang Rai | 04/04 03:35 | 44 | Amaury Raynel v Guntinun Sootinun-Opart | 7-6,6-7,10-4 |